Influence of Tricuspid Bioprosthetic Mitral Valve Orientation Regarding the Flow Field Inside the Left Ventricle: In Vitro Hydrodynamic Characterization Based on 2D PIV Measurements

The flow patterns of a prosthetic heart valve in the aortic or mitral position can change according to its type and orientation. This work describes the use of 2D particle image velocimetry (PIV) applied to the in vitro flow fields characterization inside the upper part of a left ventricular model a...

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Bibliographic Details
Published in:Artificial organs 2016-02, Vol.40 (2), p.175-179
Main Authors: Bazan, Ovandir, Ortiz, Jayme P., Fukumasu, Newton K., Pacifico, Antonio L., Yanagihara, Jurandir I.
Format: Article
Language:English
Subjects:
Bioprosthesis
Computer Simulation
Heart Rate
Heart Valve Prosthesis
Heart Ventricles - physiopathology
Humans
Hydrodynamic characterization
Hydrodynamics
Left ventricular model
Mitral bioprosthesis
Mitral Valve - physiopathology
Models, Cardiovascular
Myocardial Contraction
Prosthesis Design
Rheology
Tricuspid Valve - physiopathology
Two-dimensional particle image velocimetry measurements
Valve orientation
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Summary:The flow patterns of a prosthetic heart valve in the aortic or mitral position can change according to its type and orientation. This work describes the use of 2D particle image velocimetry (PIV) applied to the in vitro flow fields characterization inside the upper part of a left ventricular model at various heart rates and as a function of two orientations of stented tricuspid mitral bioprostheses. In the ventricular model, each mitral bioprosthesis (27 and 31 mm diameter) was installed in two orientations, rotated by 180°, while the aortic bileaflet mechanical valve (27 mm diameter) remained in a fixed orientation. The results (N = 50) showed changes in the intraventricular flow fields according to the mitral bioprostheses positioning. Also, changes in the aortic upstream velocity profiles were noticed as a function of mitral orientations.
ISSN:0160-564X
1525-1594
DOI:10.1111/aor.12515